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The role of weak bedding planes in the cross-layer crack growth paths of layered rocks

文献类型：期刊论文

作者Cui, Zhendong1,2,3; Qi, Shengwen1,2,3; Han, Weige4
刊名GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
出版日期2022-02-01
卷号8期号:1页码:21
关键词Bedding plane Crack growth path Cross-layer crack Three-point bending Cohesive zone model
ISSN号2363-8419
DOI10.1007/s40948-021-00321-x
英文摘要Weak bedding planes are considered the main cause of en echelon cross-layer cracks in layered rocks. This study aimed to determine why and how weak bedding planes affect the development of cross-layer crack paths under three-point bending conditions. A contrast test of tight sandstone and shale specimens was conducted to confirm the unique role of weak bedding planes. The global embedded cohesive zone model was used to simulate the development of en echelon cross-layer crack paths. Acoustic emission data were extracted using a self-developed plug-in code to locate rupture positions and identify fracture properties during crack propagation process. The roles of bedding plane angles, spacings, and mechanical properties on the cross-layer crack growth paths were investigated. The results indicate that dislocations occur when cracks propagate across weak bedding planes, resulting in en echelon cross-layer crack sequences. Tensile cracks across bedding planes and shearing cracks along bedding planes grew alternately to form stepped fracture surfaces. With increasing bedding plane angles, cross-layer crack dislocations and damage range tended to widen, whereas the total cross-layer crack length decreased. With increasing bedding plane spacings, crack kinking and deflection in each layer became more significant, and the total cross-layer crack length increased. With increasing mechanical properties between bedding planes, the interlaminar slipping resistances and damage zone became stronger and narrower, respectively. These findings contribute to a better understanding of the formation and evolution of cross-layer crack growth paths, providing new insights into self-stability assessment and engineering design for layered rocks.
WOS关键词FRACTURE PROPAGATION ; STEP-OVER ; BEHAVIOR ; SHALE ; FAILURE ; PARAMETERS ; ANISOTROPY ; INTERFACE ; RESERVOIR ; ZONES
资助项目Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0904] ; National Key Research and Development Project[2019YFC1509705] ; National Natural Science Foundation of China[41972296]
WOS研究方向Energy & Fuels ; Engineering ; Geology
语种英语
WOS记录号WOS:000729086800002
出版者SPRINGER HEIDELBERG
资助机构Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Key Research and Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/103916]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Han, Weige
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
4.Shijiazhuang Tiedao Univ, State Key Lab Mech Behav & Syst Safety Traff Engn, Shijiazhuang 050043, Hebei, Peoples R China
推荐引用方式
GB/T 7714		 Cui, Zhendong,Qi, Shengwen,Han, Weige. The role of weak bedding planes in the cross-layer crack growth paths of layered rocks[J]. GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,2022,8(1):21.
APA Cui, Zhendong,Qi, Shengwen,&Han, Weige.(2022).The role of weak bedding planes in the cross-layer crack growth paths of layered rocks.GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,8(1),21.
MLA Cui, Zhendong,et al."The role of weak bedding planes in the cross-layer crack growth paths of layered rocks".GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES 8.1(2022):21.

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来源：地质与地球物理研究所

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